Worbs, H. C. (1960). Gustav Mahler. Hesses.
Cita Chicago (17th ed.)Worbs, Hans Christoph. Gustav Mahler. Berlin [u.a.]: Hesses, 1960.
Cita MLA (8th ed.)Worbs, Hans Christoph. Gustav Mahler. Hesses, 1960.
Atenció: Aquestes cites poden no estar 100% correctes.